Search found 50 matches

by David G
Thu Aug 21, 2014 6:40 am
Forum: Development
Topic: tetris file for ZX-IDE
Replies: 1
Views: 839

tetris file for ZX-IDE

An interesting file to study to learn how to integrate machine language code into a ZX81 program (tetris1k, public domain code by Russell Marks) The ASM (language assembly) file only needs to be unzipped into the ZX-IDE folder. 1. Start FASMW-ZX.EXE 2. open Tetris1k.asm 3. press F8 to compile the co...
by David G
Sat Aug 16, 2014 6:58 am
Forum: WANTED
Topic: ZX81 folding Reference card
Replies: 9
Views: 5296

Re: ZX81 folding Reference card

Reference Card For The ZX80,ZX81 and the Timex Sinclair TS100
Cyborg Software Systems
1982
by David G
Sat Aug 16, 2014 6:46 am
Forum: WANTED
Topic: ZX81 folding Reference card
Replies: 9
Views: 5296

Re: ZX81 folding Reference card

Yes that was the most useful reference card. I used it every time I used my ZX81, for 30 years until last August. I moved overseas so gave away all my ZX81 stuff. The Reference Card for programming. http://kiteba.files.wordpress.com/2013/08/photo-3.jpg http://www.vintage-computer.com/images/sinclair...
by David G
Fri Aug 08, 2014 4:36 am
Forum: Software
Topic: [HELP] Recover assembler code from .p file
Replies: 11
Views: 5341

Re: [HELP] Recover assembler code from .p file

Anyone wanting to do this might give ZX Lister a try. By default it will save machine code containted in REM statements in separate files. Then it is easy to use the machine code in another program (by using ZX-IDE) or use with a dis-assembler to generate assembly langauge. ZX Lister creates a BASIC...
by David G
Fri Aug 01, 2014 12:59 am
Forum: Software
Topic: Real Time Clock for ZX81
Replies: 9
Views: 5938

Re: Real Time Clock for ZX81

It also demonstrates how to run two "apps" at the same time. Very interesting.
by David G
Thu Jul 31, 2014 8:10 am
Forum: Development
Topic: ZxList 6, P file to BASIC conversion app
Replies: 29
Views: 9788

Re: ZxList 6, P file to BASIC conversion app

Hi PokeMon,

The partial memory transfer is an excellent idea, and something like that is needed for the ZX81.

I may be able to assist with the P file import as I have coded DLLs before. I will send you a PM.

- David
by David G
Thu Jul 31, 2014 8:04 am
Forum: Software
Topic: Real Time Clock for ZX81
Replies: 9
Views: 5938

Real Time Clock for ZX81

K. Murta wrote a nice app that shows a real-time clock on the ZX81 then proceeds to run a BASIC app in the foreground.

RELOGIO (2004) http://zx81.eu5.org/toddysofte.html

I have adapted it to English. The source code shows the machine language.
by David G
Wed Jul 30, 2014 2:09 am
Forum: FAQs
Topic: Sinclair ZX80 and ZX81 technical specs.
Replies: 1
Views: 11002

Re: Sinclair ZX80 and ZX81 technical specs.

Good question for a FAQ

"Sinclair ZX Specifications" covers the information
http://problemkaputt.de/zxdocs.htm
by David G
Tue Jul 29, 2014 1:45 am
Forum: Development
Topic: ZxList 6, P file to BASIC conversion app
Replies: 29
Views: 9788

Re: ZxList 6, P file to BASIC conversion app

A couple of months ago, I was updating a ZX81 arcade game that hadn't been changed since 1982. It was just minor changes to the machine code, but took a very long time. I originally hand-coded (not using assembly language), and so room had to be found, and patched with two Jumps to the few changed b...
by David G
Tue Jul 29, 2014 12:11 am
Forum: Development
Topic: ZxList 6, P file to BASIC conversion app
Replies: 29
Views: 9788

Re: ZxList 6, P file to BASIC conversion app

Glad to hear it's working! C++ is very small code. The app uses none of optional dynamic linking options of Visual C++ 2008: * No ATL code * No MFC code * No CLR code Just straight Win32 code and C/C++. Unfortunately it stil uses the MSVCR (Microsoft Visual C Runtime), as I understand, for even the ...